Verilink 1558D (34-00255) Product Manual - Manual (Page 9)

Installation 2-1 1558D APS CSU/DSU
2. Installation
Proper installation of the 1558D unit involves the following
key steps:
• Site Survey and Preparation
• Unpacking and Inspecting Equipment
• Equipment Mounting
• T1, Alarm, and Power Connections
• Setting Equipment Options
• Preservice Testing
The following paragraphs contain information and instruc-
tions to assist the user in preparing the 1558D for operation.
A tear-out configuration guide (P/N 45-00083) is included
in the back of this manual. It is recommended that the user
sequentially follow the site preparation and unit installation
steps described.
Site Preparations
The following site preparations should be performed before
starting installation of the 1558D APS CSU/DSU unit. First,
determine the physical location of 1558D unit and perform
the following:
1. Determine the distance from the APS unit to the AC
power outlet. The 1558D is shipped from the factory
with a industry standard 3-prong, 5.5 ft. AC power cord.
The maximum current draw of the 1558D is
≤
75 milli-
amps.
2. Determine the distance from the T1 facility demark and
the actual location of the 1558D. After determining dis-
tance, verify that the proper cable lengths and types have
been ordered to connect from the T1 demark to the
1558D unit. The 1558D is shipped with three RJ-48
modular T1 cable, 10 feet in length.
3. Normally, the provider of the T1 facility will provide the
required LBO setting (transmit signal level) required for
connection to the T1 facilities. This value should be used
when setting the 1558D LBO transmit values (0, 7.5, 15,
or 22 dB) in the 1558D unit. If the value cannot be
obtained from the provider, the LBO transmit values for
Path A and Path B should be set to 0 dB.
4. Verify that the T1 line is operating properly before you
attempt to install the 1558D unit. Both of the T1 lines
should be checked for error free operation for at least one
hour to ensure that they are performing error free.
5. If the unit is to be installed in a 19’ equipment be rack,
verify that there is enough rack space available in the
rack (requires 1.75 inches per 1558D unit). Four pan
head (type 12-24 x 1/2 inch) screws are provided for
mounting the unit. An optional 23” rack mount kit is
available for applications using this size rack.
6. Verify that no external CSUs (channel service units) pre-
exist at the location where the 1558D is being installed.
The 1558D unit provides internal ESF CSU func-
tions and cannot operate properly if another
CSU is also co-located with the 1558D.
Unpacking and Inspection
This unit is carefully packaged to prevent damage in ship-
ment. Upon receipt, inspect the shipping container for dam-
age. If the shipping container or cushioning material is
damaged, notify the carrier immediately and make a nota-
tion on the delivery receipt that the container was damaged
(if possible, obtain the signature and name of the person
making delivery). Retain the packaging material until the
contents of the shipment have been checked for complete-
ness and the instrument has been checked both mechanically
and electrically.
If the contents of the shipment are incomplete or, if there is
mechanical damage or defect, notify TxPORT. If the ship-
ping container is also damaged, or the cushioning material
shows signs of stress, notify the carrier of the damage as
well as TxPORT. Keep the shipping materials for carrier’s
inspection. TxPORT will arrange for repair or replacement
without waiting for claim settlement.
Mounting
If the 1558D is to be installed in an equipment rack, simply
mount the 1558D in the equipment rack using the provided
mounting screws and rack mount adapters. If the equipment
is to be located on a desktop, remove the rack mount adapt-
ers and set the unit on any flat surface. Once the equipment
has been physically located, the following rear panel wiring
connections should be performed.
Wiring & Connections
There are several wiring connections that must be performed
to install the 1558D. The following paragraphs describe how
to attach the APS unit to the associated T1 lines, power con-
nections, alarm connections, and COM BUS connections.
Figure 2-1 should be used as a reference for the following
paragraphs concerning installation of the 1558D APS unit.
Chassis Ground Connection
The 1558D unit should be connected to a good earth ground.
To connect ground to the unit, attach a 26 gauge or larger